A system and method is disclosed for the handling of interrupts by the
disabled logical processors of an information handling system or computer
system. An interrupt service routine is written to the read-only portion
of system memory. Upon receipt of an interrupt, each disabled logical
processor branches to the hard coded interrupt service routine. The
interrupt service routine can be written to read only memory because the
context, current instruction, and return state of the disabled logical
processor are known, and the disabled logical processor will not need to
write to system memory during the execution of the interrupt service
routine. Following the handling of the interrupt by another logical
processor of the computer system, each disabled logical processor returns
to the halt state.